comparison contrib/perf.py @ 29494:3b5389ef5cfe

perf: define util.safehasattr forcibly for Mercurial earlier than 1.9.3

Before this patch, using util.safehasattr() prevents perf.py from
being loaded by Mercurial earlier than 1.9.3 (or 94b200a11cf7),
because util.safehasattr() isn't available in such Mercurial, even
though there are some code paths for Mercurial earlier than 1.9.3.

For example, setting "_prereadsize" attribute in perfindex() and
perfnodelookup() is effective only with Mercurial earlier than 1.8 (or
61c9bc3da402).

This patch is a preparation for using util.safehasattr() safely in
subsequent patches.

This patch defines util.safehasattr() forcibly without examining
whether it is available or not, because:

  - examining existence of "safehasattr" safely itself needs similar logic
  - safehasattr() is small enough to define locally

29493:4533f5b47949

    repoview,
    revlog,
    scmutil,
    util,
)

formatteropts = commands.formatteropts
revlogopts = commands.debugrevlogopts

cmdtable = {}

29494:3b5389ef5cfe

    repoview,
    revlog,
    scmutil,
    util,
)

# for "historical portability":
# define util.safehasattr forcibly, because util.safehasattr has been
# available since 1.9.3 (or 94b200a11cf7)
_undefined = object()
def safehasattr(thing, attr):
    return getattr(thing, attr, _undefined) is not _undefined
setattr(util, 'safehasattr', safehasattr)

formatteropts = commands.formatteropts
revlogopts = commands.debugrevlogopts

cmdtable = {}